SAVEWATER – Integrated satellite-AUV services for sustainable water management

March 23, 2012 - via European Space Agency

The Savewater Project conducts a feasibility study for integrated Satellite – AUV (autonomous underwater vehicle) applications in the field of water management. AUVs are unmanned vehicles which travel underwater without requiring direct control from an operator. The proposed application integrates satellite services (earth observation and navigation) and mobile platform services (in situ measurements and visualization of water characteristics).
This project will be carried out by VITO in cooperation with the Public Research Centre Gabriel Lippmann in Luxembourg.

Leading Partner: VITO Belgium

Study / Project Objectives:
The main objectives of the feasibility study for the proposed integrated application are:
    •    Research on the technical feasibility
    •    Research on the economic feasibility
    •    Large user involvement in defining the system and services, establishing the proof-of concept, and in assessing the added value
This feasibility study provides two use cases, namely:
    •    Algae blooms in reservoirs
    •    Bathymetry mapping in (partially) shallow waters over large areas

One case will be selected for a proof of concept to demonstrate the integration of satellite services with mobile platform services depending on the user requirements, the available technologies and the system and service specifications of the integrated application,. The proof of concept will be done using available earth observation and in-situ data. Based on the technical and economical feasibility and the possible interest of the end users, this project will provide a roadmap and a preparation for a follow-up demonstration project.

Expected Main Benefits
The focus of the project is developing a new integrated monitoring system to offer more information about water quality/quantity over large areas in a short time.
The expected benefits of this new monitoring technique are:
    •    Results will be available more quickly (e.g. calamities, ...)
    •    Monitoring of (partially) shallow waters
    •    Improved spatial coverage
    •    Overall cost savings

Target Users:
The target users are:
    •    Environmental agencies: environmental monitoring, swimming water quality
    •    Coastal agencies: port access, bathymetry in shallow waters
    •    Dredging sector: dredging environmental impact (turbidity, ...), bathymetry
    •    Drinking water companies: monitoring drinking water production, water quality, calamities
    •    Port authorities: port access, bathymetry
    •    Scientific community: users of data
    •    Consultancy: environmental services
    •    NGO’s: nature conservation
    •    Chemical producers: discharges in surface water
    •    Aquaculture sector: water quality and currents
    •    In-situ water quality sensor producers/suppliers
    •    AUV suppliers
    •    ICT industry

For monitoring the water quality:
In-situ monitoring is a snapshot at one place and one time with the risk that there is algal bloom on another location in the same water body.
To increase the spatial coverage using earth observation, this will lead to more targeted in-situ monitoring (hot spots)
Early detection of algal bloom development or arrival of pollution clouds in the raw water resources will lead to a better water management.

For monitoring bathymetry and currents:
To guarantee secure maritime access to ports and fare lanes it is important to measure the hydrography of the rivers and seas over large areas (e.g. the complete Western Scheldt) at one and the same time (e.g. one day).
This should be feasible in both deep and shallow waters, and with a vertical and horizontal accuracy which is comparable with the existing sounding techniques.

The general architecture of the SAVEWATER integrated system and associated services for water monitoring and water management is displayed in next figure.

The design architecture of the integrated system depends on the application and will be determined in the feasibility study. The basic components in the architecture will be:
For in-situ measurements:
    •    Water quality or quantity sensors
    •    AUV
    •    Sensors for navigation (DVL, inertial navigation system or underwater acoustic positioning system)
    •    Communication (radio interface, cellular modem, satellite modem or acoustic modem)
Earth Observation:
    •    Satellite sensors (MERIS, MODIS, ASTER, IKONOS, Worldview or Hyperion)
    •    Algorithms for assessing surface water properties
Geospatial data infrastructure:
    •    Client application 
Service layer (WMS, ...)
    •    Server layer (web server, map publishing server and database server and catalogue server.)
    •    Data source layer (the cartographic data (geodata) as well as time series data Sensor Web Enablement

Project Plan:
The project will be performed within a timeframe of 12 months.
The project plan consists of different work packages:
    •    Stakeholder/user analysis (interviews)
    •    State-of-the-art analyse: available technologies
    •    System & service definition
    •    Proof of concept
    •    Viability study
    •    Roadmap and preparation of Demo
    •    Workshop for the participants in December 2012
Key Issues:
The key issue in this study is to demonstrate the integration of satellite services (earth observation and navigation) with mobile platform services (in situ measurements and visualization of water characteristics) and the related benefits for the different users.

Service Concept:
The activity is to deliver new services or a new integrated system for an integrated spatial approach on water systems concerning water quality and quantity monitoring.

Space added value:
The added value of the integration of in-situ monitoring with earth observation are:
    •    Increase of spatial coverage and spatial resolution
    •    Consistent observations over time
    •    Provides data for a large area within a short time span
    •    An integrated approach on water systems providing also information about the surrounding environments and boundary conditions
    •    Shorter response / intervention time in case of calamities
    •    Complementarities between remote sensing and in-situ data collection through course control (hot spots)

Current Status:
Stakeholder/user analysis:
    •    Interviews with the participants
    •    Preparation of interview reports
State-of-the-art analysis:
    •    Preparation of an overview of available technologies on the market
Viability study:
    •    User consultations

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